There are a few advantages attached to large body size. They include: People with large body size are:
• Better predators – a lion for an example can kill a broad type of prey than a house cat.
• Larger bodied organisms have an added benefit in colder climates according to Bergman’s rule which states that:
The larger the animal the better it is at retaining heat. This is the reason why during the glacial times a lot of lineages of animals developed giant types. Human being follows this rule in a great way.
View also VARIATIONS AND DISTRIBUTION IN BODY
PART SIZES AROUND THE WORLD
ADVANTAGES OF A SMALL BODY SIZE
People who occupy the poles have the tendency of becoming larger on the average than those living near the equator, but there are many exceptions.
Larger people are commonly faster runners. The fact that their stride length is longer and that they can apply more force with each stride due to larger muscles gives them this benefit.